Antibacterial and sun-protective powdered solid compact composition with decorative elements and preparation method thereof

Abstract

An antibacterial and sun-protective powdered solid compact composition with decorative elements, consisting of the following raw materials in percentage by weight: 15% to 25% of aluminum starch octenylsuccinate and/or calcium starch octenylsuccinate; 45% to 65% of a carrier powder; 1% to 10% of an ultraviolet protective agent; 0.1% to 0.5% of an antibacterial agent; 1% to 5% of a non-expandable polymer powder; 5% to 15% of an viscous fluid skin-feel modifier; 0.1% to 7.5% of a plant extract, wherein the solid raw materials have a particle size of 5-50 μm, and the raw materials are thoroughly mixed and compressed to form a powdered solid compact composition with a density of 8-9 g/cm3. The manufacturing process comprising pre-mixing, blending, pulverizing, standing, and compacting under appropriate pressure enables reduced energy consumption and effectively mitigates safety hazards caused by certain flammable materials during production.

What is claimed is: 
     
         1 . An antibacterial and sun-protective powdered solid compact composition with decorative elements, characterized by comprising the following raw materials in percentage by weight:
 Aluminum starch octenylsuccinate and/or calcium starch octenylsuccinate: 15%-25%;   Carrier powder: 45%-65%;   Ultraviolet protective agent: 1%-10%;   Antibacterial agent: 0.1%-0.5%;   Non-expandable polymer powder: 1%-5%;   Viscous fluid skin-feel modifier: 5%-15%;   Plant extract: 0.1%-7.5%;   wherein:   the carrier powder is one or a mixture of mica, kaolin, silica, white clay, bentonite, magnesium stearate, and aluminum magnesium silicate;   the non-expandable polymer powder is one or a mixture of polyethylene powder, polytetrafluoroethylene powder, polyamide powder, and PMMA powder;   the solid raw materials have a particle size of 5-50 μm, and the raw materials are thoroughly mixed and compressed to form a powdered solid compact composition with a density of 8-9 g/cm 3 .   
     
     
         2 . The antibacterial and sun-protective powdered solid compact composition with decorative elements according to  claim 1 , characterized in that: the solid raw materials have a particle size of 10-30 μm. 
     
     
         3 . The antibacterial and sun-protective powdered solid compact composition with decorative elements according to  claim 1 , characterized in that: based on the total weight percentage, the viscous fluid skin-feel modifier consists of 1%-2% silicone conditioning agent, 1%-5% synthetic ester oil, and 1%-11% alcohol. 
     
     
         4 . The antibacterial and sun-protective powdered solid compact composition with decorative elements according to  claim 3 , characterized in that:
 the silicone conditioning agent is selected from one or a mixture of polymethylsiloxane, polydimethylsiloxane, alkyl methyl siloxane, and polydimethylcyclosiloxane;   the synthetic ester oil is selected from one or a mixture of caprylic triglyceride, capric triglyceride, ethylhexyl palmitate, glyceryl tri(2-ethylhexanoate), diisobutyl adipate, isopropyl palmitate, cetyl 2-ethylhexanoate, and tocopheryl acetate;   the alcohol is selected from one or a mixture of propylene glycol, caprylyl glycol, butylene glycol, pentylene glycol, and 3-[2-(ethylhexyl)oxy]-1,2-propanediol.   
     
     
         5 . The antibacterial and sun-protective powdered solid compact composition with decorative elements according to  claim 1 , characterized in that: based on the total weight percentage, the ultraviolet protective agent is one or a mixture of zinc oxide, cerium oxide, and titanium oxide, added in an amount of 5%-10%. 
     
     
         6 . The antibacterial and sun-protective powdered solid compact composition with decorative elements according to  claim 1 , characterized in that: based on the total weight percentage, the carrier powder is composed of a mixture of 15%-20% mica, 10%-15% kaolin, 15%-20% magnesium stearate, and 5%-10% silica. 
     
     
         7 . The antibacterial and sun-protective powdered solid compact composition with decorative elements according to  claim 1 , characterized in that: the plant extract is one or a mixture of aloe vera extract, calendula extract,  Bambusa arundinacea  extract, sophora flavescens extract, salvia miltiorrhiza powder, ginger extract, and white willow bark extract. 
     
     
         8 . A method for preparing the antibacterial and sun-protective powdered solid compact composition with decorative elements according to  claim 1 , characterized by the following steps:
 (1) Pre-mixing: At room temperature, add all solid raw materials, except the plant extract and the viscous fluid skin-feel modifier, into a powder mixing vessel according to their weight percentages; Stir at 2000-2500 rpm until uniformly dispersed, while controlling the temperature of the raw material mixture during stirring to not exceed 40° C.;   (2) Mixing: Pre-disperse the plant extract into the viscous fluid skin-feel modifier raw material, then spray it into the powder mixing vessel using an atomization device; During the spraying process, intermittently stir multiple times at 2000-2500 rpm until all components are uniformly dispersed, while controlling the temperature of the raw material mixture during stirring to not exceed 40° C.;   (3) Secondary Pulverization: Subject the thoroughly dispersed raw material mixture to pulverization using a high-speed pulverizer to convert it into a powder, and sieve the mixed powder through a 100-200 mesh screen;   (4) Standing: Allow the sieved mixed powder to stand thoroughly under environmental conditions of 25-28° C. temperature and 40%-60% humidity until the temperature and humidity of the mixed powder stabilize;   (5) Compaction: Load the stood mixed powder into a mold, and compact the powder within the mold to form the powdered solid compact composition with a density of 8-9 g/cm 3 .   
     
     
         9 . The method for preparing the antibacterial and sun-protective powdered solid compact composition with decorative elements according to  claim 8 , characterized in that: in step (5), the mixed sieved powder is compacted intermittently multiple times at a pressure of 70-80 kg/cm 2 .